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    • Thread Starter

    k, i'm pretty sure this is easy, but can't seem 2 work it out!
    Q7). The points P and Q lie on the curve with equation y=e(.5x)
    The x-coordinate of P and Q are ln4 and ln16 respectively.
    a). Find and equation for the line PQ
    c). Calculate the length, to 3 sig. figures of the line segment PQ

    thanx in advance!

    a) Find the y coordinates of P and Q. With this you can find the gradient of the line PQ by m= (y_q - y_p)/(x_q-x_p).
    Then put the coordinates of P or Q into
    y-y_1 = m(x-x_1)
    c) Use Pythagoras.
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Updated: February 5, 2006

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